<template>
  <div class="login_container">
    <!-- 登录块 -->
    <div class="login_box">
      <!-- 头像 -->
      <div class="avatar_box">
        <img src="../assets/me.jpg" alt="头像" />
      </div>
      <!-- 表单区域 -->
      <el-form ref="loginFormRef" :rules="loginRules" :model="loginForm" class="login_form" label-width="0">
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-denglu"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" prefix-icon="iconfont icon-mima" type="password"></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="danger" @click="resetForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
    data() {
        return {
          // 表单数据
            loginForm: {
                username: 'admin',
                password: '123456'
            },
            // 验证规则
            loginRules: {
              username: [
                // 必填项验证
                { required: true, message: '用户名为必填项', trigger:'blur' },
                // 长度校验
                { min: 3, max: 5, message: '长度在3到5个字符', trigger:'blur' }
              ],
              password: [
                { required: true, message: '用户密码为必填项', trigger:'blur'},
                { min: 6, max: 10, message:'长度在6到10个字符', trigger: 'blur'}
              ],
            },
        }
    },
    methods: {
      // 重置表单
      resetForm() {
        this.$refs.loginFormRef.resetFields();
      },
      // 登录
      login() {
        // 验证校验
        this.$refs.loginFormRef.validate(async valid => {
          if(!valid) return;
          // 访问后台
          const {data:res} = await this.$http.post("login",this.loginForm);
          if(res.flag == 'ok') { // 登录成功
            this.$message.success('操作成功！');
            window.sessionStorage.setItem("user",res.user); // 存储用户信息
            this.$router.push({
              path: "/home"
            });
          } else { // 登录失败
            this.$message.error('操作失败！');
          }
        })
      }
    }
};
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}

.login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    .avatar_box {
        width: 130px;
        height: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 5px;
        box-shadow: 0 0 5px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%,-50%);
        background-color: #0ee;
        img {
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background-color: #eee;
        }
    }
}

.btns {
    display: flex;
    justify-content: flex-end;
}

.login_form {
    position: absolute;
    bottom: 0%;
    width: 100%;
    padding: 0 10px;
    box-sizing: border-box;
}
</style>